Sigma-LG Otis DHI-150 board
Table of Contents
Sigma DHI-150 board
Sigma DHI-150 board
Sigma LG DPJ34325ASO Lights
Otis Techno Electronics 3X03405A
LG Sigma display board DHI-150
Otis DHI-150 / TWTX06 / independent display
Ordering the dhi-150 board
To order the dhi-150 board, send us a photograph of the existing unit and its nameplate at [email protected]. Please quote the complete code including any revision suffix so that our team can confirm the correct variant, current stock and lead time before you commit.
About the dhi-150 board
Elevator and escalator installations are built around a relatively small number of serviceable assemblies, but they fail at very different rates. The dhi-150 board sits in the control board / PCB group, and it is replaced on a different service interval from the assemblies around it. In practice the failures we see on dhi-150 board come down to electrolytic capacitor ageing, cracked solder joints around the power stage, corroded edge connectors, and blown output transistors after a supply fault.
Every dhi-150 board we supply is inspected before dispatch. Each unit is checked for physical damage, correct marking and the specific wear or degradation patterns that matter for this class of component, then packed to survive international transit. Where a superseded revision is the only one available, we say so plainly and explain the substitution, so the installing engineer can make an informed decision rather than discovering the difference on site.
Buying guidance and compatibility notes
Before ordering the dhi-150 board, confirm three things. First, the controller catalogue number and the board revision letter, plus the fault code stored in the controller memory. Second, the same board is frequently fitted across several controller families, so the equipment model alone is not enough to identify the right revision. Third, whether the installation is a traction lift or an escalator, since duty cycle and loading differ between the two.
On fitting, one point is worth repeating: discharge the DC bus before removing a power board, and photograph the connector layout before you unplug anything. Almost every repeat failure we see on dhi-150 board traces back to a related component that was left in place, or to an adjustment that was assumed rather than measured.
Anti-static handling is not a formality. A board that works perfectly on the bench can be destroyed by a discharge too small for a technician to feel, which is why stock travels in shielded bags and is unpacked only at the point of fitting.
From a spares point of view, we ask for a photograph of the rating plate as well as the board, since the same board is shared across families; the controller catalogue number, the board revision letter and any fault code stored in memory are the three details that let us identify the part without guesswork.
Firmware is the hidden variable. Two boards with the same part number can carry different firmware revisions, and a replacement that is electrically correct may still need a parameter download before the lift will run properly. Where we know this applies, we say so before shipping.
If the installation is showing a fault code that clears on reset and returns days later, the identification route is straightforward: the marking printed on a failed board is often the least reliable identification available, because it is exactly the part that has been damaged.
If you are unsure which variant of the dhi-150 board you need, send a photograph of the nameplate and the existing component alongside a description of the fault. That is usually enough for our team to identify the correct replacement without a site visit, and it avoids the cost and delay of returning an incompatible part. We are also happy to advise on the other serviceable items in the same control board / PCB group, so a planned shutdown can cover several wear items at once.
Related parts and further reading
Because dhi-150 board is only one item in the control board / PCB group, these related pages may help you plan the work:
- Elevator spare parts
- Door Operator Controller
- Elevator Display
- Elevator Encoder
- Elevator Service Tool
Reference sources
The compatibility information on this page was cross-checked against the following authoritative references. Always confirm the exact reference against your own equipment nameplate.
